/**
 * ****************************************************************************
 * Copyright 2011-2013 Sergey Tarasevich
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * *****************************************************************************
 */
package com.taptech.doufu.sdk.universalimageloader.utils;

import android.util.Log;

import com.taptech.doufu.sdk.universalimageloader.core.ImageLoader;

/**
 * "Less-word" analog of Android {@link Log logger}
 *
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 * @since 1.6.4
 */
public final class L
{

    private static final String LOG_FORMAT = "%1$s\n%2$s";
    private static volatile boolean DISABLED = false;

    private L()
    {
    }

    /**
     * Enables logger (if {@link #disableLogging()} was called before)
     */
    public static void enableLogging()
    {
        DISABLED = false;
    }

    /**
     * Disables logger, no logs will be passed to LogCat, all log methods will do nothing
     */
    public static void disableLogging()
    {
        DISABLED = true;
    }

    public static void d(String message, Object... args)
    {
        log(Log.DEBUG, null, message, args);
    }

    public static void i(String message, Object... args)
    {
        log(Log.INFO, null, message, args);
    }

    public static void w(String message, Object... args)
    {
        log(Log.WARN, null, message, args);
    }

    public static void e(Throwable ex)
    {
        log(Log.ERROR, ex, null);
    }

    public static void e(String message, Object... args)
    {
        log(Log.ERROR, null, message, args);
    }

    public static void e(Throwable ex, String message, Object... args)
    {
        log(Log.ERROR, ex, message, args);
    }

    private static void log(int priority, Throwable ex, String message, Object... args)
    {
        if (DISABLED)
            return;
        if (args.length > 0)
        {
            message = String.format(message, args);
        }

        String log;
        if (ex == null)
        {
            log = message;
        } else
        {
            String logMessage = message == null ? ex.getMessage() : message;
            String logBody = Log.getStackTraceString(ex);
            log = String.format(LOG_FORMAT, logMessage, logBody);
        }
        Log.println(priority, ImageLoader.TAG, log);
    }
}